JP3300737B2 - Continuous hot rolling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot rolling process in which a rear end portion of a preceding rolled material and a front end portion of a subsequent rolled material are joined between a rough rolling mill group and a finishing rolling mill group to continuously perform hot rolling. The present invention relates to a continuous hot rolling facility to be performed.

[0002]

2. Description of the Related Art In recent years, in a hot rolling equipment for strip steel, a preceding rough rolling material and a subsequent rough rolling material are joined between a rough rolling mill group and a finishing rolling mill group, and a finishing rolling mill in a next process is formed. Continuous hot rolling equipment that performs finish rolling in groups has been developed. A conventional continuous hot rolling facility will be described with reference to FIG. FIG. 4 is a side view showing the concept of a conventional continuous hot rolling facility.

[0003] As shown in FIG. 4, a crop shear 3 is provided on the downstream side of the group of rough rolling mills 1 between the group of rough rolling mills 1 and the finish rolling mill 2. The crops at the rear end portion 4 and at the front end portion of the subsequent rough rolled material 5 are cut and removed. A joining device 6 is provided on the downstream side of the crop shear 3, and the joining device 6 joins the rear end of the preceding rough rolled material 4 and the front end of the subsequent rough rolled material 5. In other words, while the joining device 6 is moved by the bogie 7 at the same speed as the advance rough rolling material 4 and the subsequent rough rolling material 5, the rear end of the preceding rough rolling material 4 is clamped by the delivery side clamp 9 in the housing 8. At the same time, the leading end of the subsequent rough-rolled material 5 is clamped by the entry-side clamp 11 in the inner frame 10. In this state, for example, the joined portion is heated and heated by the heater 12 by the eddy current of the high-frequency coil, and the inner frame 10 is moved to the exit side so that the rear end portion of the preceding rough rolled material 4 and the subsequent rough rolled material 5 and are joined by pressing in the traveling direction.

On the downstream side of the joining device 6, a ridge removing device 1 is provided.
3 is provided, and the swelling removal device 13 removes the swelling at the junction between the rear end of the preceding rough rolled material 4 and the front end of the subsequent rough rolled material 5. That is, as shown in FIG. 5, bulges 15 occur on the upper and lower surfaces of the joint 14 between the preceding rough rolled material 4 and the subsequent rough rolled material 5 due to the compression of the pressure bonding. Foreign matters 16 such as scales are gathered in the swelling 15, and when the swelling 15 is rolled to the finish rolled material 17 by the finishing mill group 2 while the swelling 15 is present, as shown in FIG. Thus, it is left in the finish rolled material 17 over a long range. If the foreign matter 16 remains in the finish rolled material 17, the foreign matter 16 significantly lowers the strength of the joint portion 14. For this reason, the swelling removal device 13 removes the swelling of the joint portion 14. That is, the ridge removing device 13 is provided with a pair of rotary blades 18 with the rolled material interposed therebetween. As shown in FIG. 7, the ridge 15 of the joint 14 is cut by the cutting blade 19 of the rotary blade 18. Has been removed.

When the ridge 15 is removed by the ridge removing device 13, high-temperature chips are scattered at a high speed on the rotation side (upstream side in the illustrated example) of the cutting blade 19 and adhere to the surface of the rolled material. There was a risk of doing so. For this reason, a chip removing device 20 shown in FIG. As shown in FIG. 8, a rotary grindstone 21 is provided so as to be movable in the width direction of the rolled material, and the surface of the rolled material is ground by the rotary grindstone 21 to scatter chips 22 in the lateral direction of the rolled material. On the other hand, a dust collecting hood 23 is provided on a side of the rolled material, and the dust collecting hood 23 has a water supply pipe 24 and a water tank 2.
5 is supplied in a laminar flow through the water film 5 so that a water film 26
Are formed. The high-temperature chips 22 scattered toward the dust collecting hood 23 in the lateral direction of the rolled material when being ground by the rotating grindstone 21 are captured by the water film 26, cooled, fall, and pass through the discharge groove 27 together with water. Collected in a pit not shown.

[0006]

In the conventional continuous hot rolling equipment, the surface of the rolled material is ground by the chip removing device 20 so that the high temperature generated when the ridge 15 is removed by the ridge removing device 13 is removed. This prevents chips from sticking to the rolled material. However, since the chip removing device 20 processes the chips 22 in the width direction of the rolled material, a dust collecting hood 23 having a wide wall surface is required, which is disadvantageous in terms of space. Further, although the swelling removing device 13 has the rotary blades 18 provided above and below the rolled material, since the lower rotating blades 18 cannot form the water film 26 and the water droplets flowing down, the chip removing device 20 is used. Is provided only in the vicinity of the upper rotary blade 18 at present.

[0007]

To solve the above-mentioned problems, the present invention is directed to a method of forming a roll between a rough rolling mill group and a finishing rolling mill group. In the continuous hot rolling equipment for performing continuous rolling by providing a joining device for joining, a rotary blade having a width equal to or greater than the maximum plate width of the rolled material is vertically arranged between the joining device and the finishing mill group. The upper rotary cutter is supported by a chock that moves up and down by a reduction cylinder, and the lower rotary cutter is supported by a chock that moves up and down by a height adjustment cylinder, and chips are discharged from the upper rotary knife. An upper chip discharging means having a running water jetting means is provided on a side thereof, and a lower chip discharging means having a running water jetting means is provided on a chip discharging side of the lower rotary blade.

The rear end portion of the preceding rolled material and the front end portion of the subsequent rolled material are joined by a joining device, and the raised portion of the joined portion is cut and removed by a pair of upper and lower rotary blades. When removing the raised part, adjust the height of the lower rotary blade with a height adjustment cylinder, rotate the upper and lower rotary blades at high speed according to the progress of the rolling material, and press down the cylinder and height adjustment cylinder. As a result, the raised portions on the upper and lower surfaces are simultaneously removed by the rotary blade. Chips blown in the direction of rotation by the high-speed rotation of the rotary blade are respectively stored in upper and lower chip discharge means, and the running water is jetted from running water jetting means to cool the chips and flow down to discharge the chips.

[0009]

1 is a side view showing a concept of a continuous hot rolling equipment according to an embodiment of the present invention, and FIG.
FIG. 3 is a view taken along line II-II, and FIG. 3 is a view taken along line III-III in FIG. Note that the same members as those of the continuous hot rolling equipment shown in FIG. 4 are denoted by the same reference numerals, and redundant description is omitted.

As shown in FIG. 1, a crop shear 3 is provided on the downstream side of the rough rolling mill group 1. The crop at the tip of No. 5 is cut and removed. On the downstream side of the crop shear 3, a joining device 6 is provided.
The joining device 6 joins the rear end of the preceding rough rolled material 4 and the front end of the subsequent rough rolled material 5. An ascending removing device 31 is provided between the joining device 6 and the finishing mill group 2, and the ascending removing device 31 cuts and removes the ascending portion of the joining portion 14.

1 to 3, the ridge removing device 3 will be described.
1 will be described. A pair of rotary blades 32 are disposed on the ridge removing device 31 with the rolled material interposed therebetween, and the pair of rotary blades 32 are formed with cutting blades 33 having a width equal to or larger than the maximum plate width of the rolled material on the outer peripheral surface. I have. A roll chock 3 is mounted on a housing 34 of the swelling removing device 31 via a rolling down cylinder 35.
6 is supported so as to be able to move up and down freely, and the upper rotary blade 32 is rotatably supported by the roll chock 36. A roll chock 38 is supported by the housing 34 via a height adjusting cylinder 37 so as to be able to move up and down.
8, a lower rotary blade 32 is rotatably supported.

An upper chip discharge duct 39 as upper chip discharge means is provided near the rear side in the rotation direction of the upper rotary blade 32, and the upper chip discharge duct 39 has an opening below the rotary blade 32. An opening 40 wider than the rotary blade 32 is formed. A running water jet header 41 as running water jetting means is provided in the upper chip discharge duct 39, and a jet nozzle 42 of the running water jet header 41 is provided from above to below. The upper swarf discharge duct 39 is provided with a discharge portion 43, and the discharge portion 43 is provided on the working side (the left side in FIG. 2) of the rotary blade 32.
And extends to the drain groove 44. Chips 45 generated by the cutting by the upper rotary blade 32 are collected from the opening 40 into the upper chip discharge duct 39, and are discharged to the drain groove 44 by jetting of flowing water from the flowing water jet header 41.

A lower chip discharge duct 46 serving as lower chip discharge means is provided near the rear side of the lower rotary blade 32 in the rotation direction, and the lower chip discharge duct 46 is opened above the rotary blade 32 and rotates. An opening 47 wider than 32 is formed. A running water jet header 48 as running water jetting means is provided in the lower swarf discharge duct 46, and a jet nozzle 49 of the running water jet header 48 is provided upward from below. The lower chip discharge duct 46 is provided with a discharge unit 40, and the discharge unit 50 is provided to open above the drain groove 44. The swarf 45 generated by the cutting by the lower rotary blade 32 is collected from the opening 47 into the lower swarf discharge duct 46, and is discharged to the drain groove 44 by jetting the flowing water from the flowing water jet header 48.

In the above-described continuous hot rolling equipment, the rear end of the preceding rough rolled material 4 and the front end of the subsequent rough rolled material 5 are joined by the joining device 6, and the rotary blade 32 of the ridge removing device 31 is joined.
The raised portion 15 of the joint portion 14 is cut and removed by the cutting blade 33 (see FIG. 7).

In the ridge removing device 31, the height of the upper surface of the lower rotary blade 32 is adjusted in advance by a height adjusting cylinder 37, and the upper and lower rotary blades 32 are driven and rotated in the opposite directions to the traveling direction of the rolled material. You. At the time of cutting, the rotary blades 32 are lowered by the pressing cylinder 35 and the height adjusting cylinder 37, and the foreign matter in which the scale and the like of the joint portion 14 are collected is cut and removed simultaneously with the ascending 15 and the upper and lower surfaces (see FIG. 7).

The high-temperature chips 45 blown at high speed by the high-speed rotation of the rotary blade 32 during cutting are collected in the upper chip discharge duct 39 and the lower chip discharge duct 46, respectively, and are supplied to the flowing water jet header 41. , 48 ejection nozzles 42,
49 is cooled by the jet water from
The water is drained into the drains 44 and is discharged into the drains 44. As a result, it is possible to simultaneously cut and remove the swelling 15 of the joining portion 14 on the upper and lower surfaces of the rolled material, and the high-temperature chips 45 are supplied to the upper chip discharging duct 39 and the lower chip discharging duct 46. Since it is captured and discharged to the drain groove 44, there is no possibility that the high-temperature chips 45 adhere to other devices or the like.

In the above embodiment, the rotary blade 32 is rotated in the direction opposite to the traveling direction of the rolled material. However, the rotary blade 32 may be rotated in the traveling direction.

[0018]

According to the continuous hot rolling equipment of the present invention, rotary cutters having a width equal to or larger than the maximum sheet width of a rolled material are arranged above and below a rolled material between a joining device and a finishing mill group, respectively. An upper cutter that supports the upper rotary knife on the chock that moves up and down by the cylinder, supports the lower rotary cutter on the chock that moves up and down by the height adjustment cylinder, and has running water injection means on the chip discharge side of the upper rotary cutter In addition to providing the powder discharging means and the lower chip discharging means having running water jetting means on the chip discharging side of the lower rotating blade, the rotating cylinder is rotated at a high speed, and the rotary cutter is rotated by a rolling cylinder and a height adjusting cylinder to be chocked. By rolling down the rotary blade through, the ridge of the leading end of the preceding rolled material and the leading end of the succeeding rolled material joined by the joining device is cut and removed by a pair of upper and lower rotary blades, Rolling cutlery chips blown off in the direction of rotation by the high-speed rotation of the respectively stored in upper and lower chip discharge means, cuttings from flowing water injecting means is flowing water injection is discharged by flowing downward while being cooled. As a result, the raised portions on both sides of the joint can be simultaneously removed by a continuous operation according to the progress of the rolled material, and the high-temperature chips can be prevented from adhering to other devices.

[Brief description of the drawings]

FIG. 1 is a side view showing the concept of a continuous hot rolling facility according to one embodiment of the present invention.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a view taken along line III-III in FIG. 2;

FIG. 4 is a side view showing the concept of a conventional continuous hot rolling facility.

FIG. 5 is a side view showing the state of the joint.

FIG. 6 is a side view showing the state of the joint.

FIG. 7 is a side view showing a cutting state of a joint.

FIG. 8 is a schematic explanatory view of a chip removing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rough rolling mill 2 Finish rolling mill 3 Crop shear 4 Leading rough rolling material 5 Trailing rough rolling material 6 Joining device 14 Joining part 15 Rise 31 Rise removal device 32 Rotary blade 33 Cutting blade 34 Housing 35 Press-down cylinder 36 Roll chock 37 Height adjusting cylinder 39 Upper chip discharge duct 40 Opening 41 Running water jet header 42 Spout nozzle 43 Discharge section 44 Drainage groove 45 Chips 46 Lower chip discharge duct 47 Opening 48 Running water jet header 49 Spray nozzle 50 Discharge section

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Nakagawa 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works No. 6-22 Mitsubishi Heavy Industries, Ltd.Hiroshima Research Center (72) Inventor Motofumi Kuroda 4-22, Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd.Hiroshima Research Center (72) Inventor Hideyuki Nikaido Chuo, Chiba 1 Kawasaki-cho, Ward-ku Kawasaki Steel Corporation Chiba Works (72) Inventor Takeshi Hirabayashi 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corporation Chiba Works, Chiba-shi (72) Inventor Shigefumi Katsura 1 Kawasaki-cho Kawasaki Steel Corporation Chiba Works (72) Inventor Toshiaki Amagasa Kawa, Chuo-ku, Chiba-shi, Chiba No. 1, Kawasaki Steel Corporation Chiba Works (72) Inventor Jun Yuki 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Corporation Chiba Works (56) References JP 9-122712 (JP, A) JP-A-9-122918 (JP, A) JP-A-5-277916 (JP, A) Japanese Patent Publication No. 60-33608 (JP, B2) Japanese Utility Model Publication No. 64-20214 (JP, Y1) (58) (Int.Cl. ⁷ , DB name) B21B 15/00 B21B 1/26 B23Q 11/00 B24B 9/04 B23C 3/13

Claims (1)

(57) [Claims] 1. A continuous hot rolling facility for performing continuous rolling by providing a joining device for joining a rear end portion of a preceding rolled material and a leading end portion of a succeeding rolled material between a rough rolling mill group and a finishing rolling mill group. In the above, a rotary blade having a width equal to or greater than the maximum sheet width of the rolled material is disposed above and below the rolled material between the joining device and the finishing mill group, and the rotary blade on the upper side is moved to a chock which is moved up and down by a rolling cylinder. Along with supporting the lower rotary knife on a chock that moves up and down by a height adjusting cylinder, and providing an upper chip discharge means having running water injection means on a chip discharge side of the upper rotary cutter, A continuous hot rolling equipment comprising a lower chip discharge means having a running water injection means on a chip discharge side of a lower rotary blade.